1. Battery Basics
Rob Faludi

2. there are thousands of
different batteries

3. only one is best for
your project

4. factors to consider
• Power needs
• Maximum current
• Run time
• Replacement schedule
• Size
• Shelf-life
• Context and availability

5. one factor at a time

6. pressure and current
• Voltage ~= water pressure
• Amperes ~= water current

7. power
• WATTS
• Wattage: W = VA
• watts = volts * amps
• 100 volts, 2A = ?
• 3.3 volts, 100 mA = ?

8. capacity
• mAh = milliamp hour
• how many milliamps supplied for 1 hour
• capacity is total power available over time
• run time is based on capacity

9. calculating run time
• power draw over time
• mAh = mA * hours
• measuring amperage

10. PRODUCT DATASHEET
1-800-383-7323 / USA USA/CAN
1-800-383-7323
www.energizer.com
1-800-383-7323 / CANADA
ENERGIZER 522 9V
data sheets
Specifications
Classification: Alkaline
Chemical System: Zinc-Manganese Dioxide (Zn/MnO 2)
No added mercury or cadmium
Designation: ANSI-1604A, IEC-6LR61
Nominal Voltage: 9.0 volts
Operating Temp: -18°C to 55°C (0°F to 130°F)
Industry Standard Dimensions Typical Weight: 45.6 grams (1.6 oz.)
mm (inches) Typical Volume: 21.1 cubic centimeters (1.3 cubic inch)
Jacket: Metal
Shelf Life: 5 years at 21°C (80% of initial capacity)
17.50 (0.689) Terminal: Miniature Snap
15.50 (0.610)
12.95 (0.510)
12.45 (0.490)
26.50 (1.043)
24.50 (0.965)
Milliamp-Hours Capacity
•
Continuous discharge to 4.8 volts at 21°C
Look for:
800
Capacity (mAh)
600
48.50 (1.909)
46.40 (1.827)
46.50 (1.831) 400
Maximum
• mAh
200
0
25 100 300 500
Discharge (mA)
• max current
Device Selection Guide:
Battery Selection Indicator
High Drain
Toy Devices
• Voltage Baby Monitor
Garage Opener Moderate
Drain Devices
Clock Radio
Smoke Detector Low Drain
Devices
Important Notice
This datasheet contains typical information specific to products manufactured at the time of its publication.
©Energizer Holdings, Inc. - Contents herein do not constitute a warranty.
Form No. EBC - 1108I Page 1 of 2

11. batteries come in more
than one flavor

12. chemistry
• Alkaline
• NiMH
• NiCad
• Lithium
• Lithium Ion

13. size, life and access
• D, C, AA, AAA
• Coin cells
• Li-ion packs
• Self draining
• Availability

14. other stuff
• Step-ups
• Solar
• Capacitors

15. sourcing
• http://itp.nyu.edu/
physcomp/Parts/
RechargeableBatteries
• http://
www.sparkfun.com/
commerce/
categories.php?c=54

16. chargers

17. battery tests
• http://www.faludi.com/projects/arduino-
and-xbee-battery-test-results/

18. scenarios
1. Power needs
2. Max current
3. Run time
4. Capacity
5. Size
6. Shelf-life
7. Context and availability

19. Rob Faludi
www.faludi.com